Manganese dioxide

Patent 4277360 Issued on July 7, 1981. Estimated Expiration Date:

March 28, 1999. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

1259099

1275666

1303911

1988799

2885262

3427126

Inventors

Assignee

Union Carbide Corporation

Application

No. 06/024596 filed on 03/28/1979

US Classes:

252/182.1, HAVING UTILITY AS A REACTIVE MATERIAL IN AN ELECTROCHEMICAL CELL; E.G., BATTERY, ETC.423/49, Group VIIB metal (Mn, Tc, or Re)423/605, Group VIIB metal (Mn, Tc, or Re)429/224Manganese component is active material

Examiners

Primary: Carter, Herbert T.

Attorney, Agent or Firm

O'Brien; Cornelius F.

International Classes

C01G 45/00 (20060101)
C01G 45/02 (20060101)
H01M 4/50 (20060101)

Abstract

A homogeneous manganese dioxide composition having on a microscopic scale domains of alpha and delta manganese dioxide is manufactured by reacting a manganese-oxygen containing composition with a sodium containing composition at elevated temperature followed by acid treatment.

Other References

Kozawa et al., "Electrochemical Technology", vol. 5, 1967, pp. 535-542
Gattow et al., "Zeit. fur Amorg. & Allgem. Chemie", vol. 309, 1961, pp. 121-150
"X-Ray Diffraction Key to the Manganese Oxide Minerals", E. J. Lavino & Co., Philadelphia, Pa., 1964.
Mellor, "Comprehensive Treatise on Inorg. & Theo. Chemistry", vol. 12, 1932, Longman Green & Co., N. Y. p. 261
Wells, "Structural Inorganic Chemistry", Clarendon Press, Oxford, 1962, pp. 472-473
Glemser, "Berichte", vol. 72B, 1939, pp. 1879-1881
Butler et al., "Jour. of the Electrochem. Soc." vol. 100, 1953, pp. 297-301
Cole et al., "Transactions of the Electrochem. Soc.", vol. 92, 1947, pp. 133-158
Parant et al., "J. of Solid State Chem.", vol. 3, 1971, pp. 1-11, (pp. 1-23 of Translation)